The lower portion of the BRAIN STEM. It is inferior to the PONS and anterior to the CEREBELLUM. Medulla oblongata serves as a relay station between the brain and the spinal cord, and contains centers for regulating respiratory, vasomotor, cardiac, and reflex activities.

Synonyms: External Cuneate Nucleus, Arcuate Nucleus of the Medulla, Accessory Cuneate Nucleus, Nucleus, Ambiguous, Arcuate Nucleus 1, Cuneate Nucleus, Lateral, Cuneate Nucleus, Accessory, Nucleus, Accessory Cuneate, Nucleus, External Cuneate, Nucleus, Lateral Cuneate, Ambiguous Nucleus, Medulla Oblongata, Cuneate Nucleus, External, Ambiguus, Nucleus, Arcuate Nucleus-1s, Lateral Cuneate Nucleus, Arcuate Nucleus-1, Nucleus Ambiguus, Medulla Oblongatas